One hundred and eight years.That's how long the crossing
took.They spent most of the time in chilled hibernation,
aging at only one thirtieth normal.But that didn't mean they
aged just a little more than three years in the crossing.No,
that slumbering interval they hardly noticed.It was the time
in between that gnawed at their mind.

The sleep was no good for more than four months subjective -- not
if you wanted any muscle or bone mass to survive.So every
ten years of real time, they awoke, spent six months recovering and doing
maintenance aboard the ship.Then they slept again, repeating
the cycle nine or ten times until they came to Tau Ceti.
Nearly a decade ofaging on the body was almost nothing compared to
the five or six years spent in the darkened void, staring at stars so far away
to make them feel like insignificant specs on the face of the universe.